[Ips-msgr] IPS Monthly Report - March 01
rwc
rwc at ips.gov.au
Mon Apr 2 12:06:12 EST 2001
SUBJ: IPS MONTHLY SUMMARY - MARCH 2001
ISSUED BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SOLAR-GEOPHYSICAL INDICES
SOLAR AUST AUST
Day 10 cm flux A-INDEX T INDEX
01-Mar 131 6 145
02-Mar 130 9 142
03-Mar 140 11 148
04-Mar 141 17 146
05-Mar 156 11 136
06-Mar 158 5 154
07-Mar 177 7 147
08-Mar 167 7 144
09-Mar 161 5 132
10-Mar 160 5 143
11-Mar 158 2 148
12-Mar 158 10 148
13-Mar 147 7 142
14-Mar 142 6 139
15-Mar 136 1 138
16-Mar 140 2 147
17-Mar 134 3 145
18-Mar 140 5 155
19-Mar 147 23 153
20-Mar 153 50 92
21-Mar 159 7 99
22-Mar 183 10 151
23-Mar 180 21 131
24-Mar 219 12 88
25-Mar 217 4 128
26-Mar 264 4 155
27-Mar 273 20 149
28-Mar 274 27 147
29-Mar 262 13 175
30-Mar 257 10 184
31-Mar 246 113 171 (severe disturbance)
10 CM SUNSPOT SUNSPOT AUST AUST No of
FLUX NUMBER NUMBER A-INDEX T INDEX FLARES
Monthly Monthly Yearly Monthly Monthly >M1.0
Month Average Average Average Average Average
Mar 00 208.2 138.2 119.8 8.2 147.1 38
Apr 00 184.2 125.3 120.7 10.3 154.9 11
May 00 184.5 120.8 118.9 9.7 138.7 20
Jun 00 178.8 124.9 118.6 10.0 133.5 24
Jul 00 200.0 169.1 119.6 12.8 147.3 54
Aug 00 163.1 130.5 118.4 10.7 145.9 3
Sep 00 182.1 109.9 116.1 13.1 132.1 15
Oct 00 167.8 100.1 114.7p 12.0 133.4 11
Nov 00 178.8 106.5 114.2p 14.4 135.4 23
Dec 00 173.0 104.5 113.6p 8.2 143.0 7
Jan 01 166.7 95.1 110.9p 8.4 139.2 8
Feb 01 147.3 80.1 107.8p 7.0 137.2 1
Mar 01 177.7 114.2 107.0p 14.0 142.6 36
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1992 153 173 155 134 96 80 88 67 69 67 85 90
1993 75 78 80 64 63 65 63 51 38 41 34 44
1994 57 41 43 26 16 15 23 18 21 21 21 21
1995 25 34 23 13 4 12 13 11 13 10 13 8
1996 12 8 5 2 6 3 3 5 4 4 11 15
1997 14 11 11 9 12 6 9 18 33 28 28 39
1998 41 42* 46 57 45 57 78 77 89 71 75 94
1999 95* 82* 90* 79 99 125 126 107 90 92 124 115
2000 109 121* 161 156 135* 134* 149* 139* 124* 131* 142* 157*
2001 140* 140* 122^ 120^ 117^ 113^ 109^ 106^ 104^ 103^ 102^ 101^
2002 99^ 97^ 95^ 93^ 91^ 89^ 86^ 84^ 81^ 79^ 76^ 74^
2003 71^ 69^ 66^ 64^ 61^ 59^ 57^ 54^ 52^ 49^ 47^ 45^
2004 43^ 41^ 39^ 37^ 35^ 33^ 31^ 29^ 28^ 26^ 24^ 23^
2005 21^ 20^ 19^ 17^ 16^ 15^ 14^ 13^ 12^ 11^ 10^ 9^
2006 8^ 8^ 7^ 6^ 6^ 5^ 5^ 5^ 4^ 4^ 4^ 4^
2007 4^ 5^ 5^ 6^ 7^ 8^ 9^ 11^ 13^ 16^ 18^ 21^
2008 25^ 28^ 32^ 36^ 41^ 45^ 50^ 54^ 59^ 64^ 68^ 73^
* = New data. T index may have changed.
^ = IPS predicted T index.
===============================================================================
2. FLARES AND SHORT-WAVE FADEOUTS
DATE CLASS M CLASS X FLARE FADEOUT POSSIBLE ON
FLARES FLARES MAX DAYLIGHT HF CIRCUIT
08 Mar 01 M5.7/1B 1118UT 1113-1121UT
09 Mar 01 M1.5/1N 0157UT
10 Mar 01 M6.7/1B 0405UT 0400-0407UT
20 Mar 01 M1.1/SF 0218UT
20 Mar 01 M1.2/SF 0333UT
20 Mar 01 M1.1/SF 1424UT
20 Mar 01 M1.6/1F 1507UT
20 Mar 01 M1.5 2104UT
21 Mar 01 M1.1/SF 0218UT
21 Mar 01 M1.8/SN 0237UT
22 Mar 01 M1.6 0821UT
22 Mar 01 M1.0/SF 1319UT
24 Mar 01 M1.2/SF 0138UT
24 Mar 01 M1.7/2N 1955UT
24 Mar 01 M1.1/1F 2318UT
25 Mar 01 M2.5/2N 0424UT
25 Mar 01 M2.6/1N 1116UT
26 Mar 01 M2.7/1N 0239UT
26 Mar 01 M2.2/1F 1326UT
27 Mar 01 M2.2/1N 1630UT
28 Mar 01 M1.1/SF 0158UT
28 Mar 01 M1.3/SN 0947UT
28 Mar 01 M4.3/SF 1240UT 1121-1306UT
28 Mar 01 M1.5/1F 1909UT
28 Mar 01 M1.6/1N 2247UT
28 Mar 01 M2.2/SN 2330UT
29 Mar 01 M2.1/1N 0256UT
29 Mar 01 X1.7 /SF 1015UT 0957-1032UT
29 Mar 01 M2.1/SF 1135UT
29 Mar 01 M1.6/SF 1418UT
29 Mar 01 M1.3 1434UT
29 Mar 01 M1.5/SF 1458UT
29 Mar 01 M1.2/SF 1525UT
29 Mar 01 M1.2 2101UT
30 Mar 01 M2.2/1N 0515UT
31 Mar 01 M2.1/SF 1112UT
2.1 Comments on Solar Activity.
Solar activity ranged from low to high levels this month. Flare
activity was much more frequent this month, with a total of 36 flare
events, 35 M class and 1 X class event. A large solar region, SEC
number 9393, produced the X1 solar flare on 29 March. This event was
associated with a proton event which began at 1715UT on 29 March and
ended at 0815UT 31 March, and a halo coronal mass ejection. The
mass ejection caused a severe geomagnetic disturbance on 31 March.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
04 Mar 01: Quiet to Active
19 Mar 01: Quiet to Minor Storm
20 Mar 01: Unsettled to Severe Storm Levels
23 Mar 01: Quiet to Active
27 Mar 01: Quiet to Minor Storm
28 Mar 01: Quiet to Minor Storm.
31 Mar 01: Severe storm levels.
Disturbed days this month were mostly associated with coronal mass
ejections. The storm on 31 March was very severe, and by far the strongest
for the month. The disturbance followed a sudden impulse of 75 nT at 0051UT
on 31 March. The field was at major to severe storm levels for much of the UT
day. Aurora sightings were reported at mid latitudes during the disturbance.
Severe storm levels were also briefly observed on 20 March. Storm activity
followed a sudden impulse of 20nT at 1114UT on 19 March. The storm
intensified on 20 March due to strongly southward interplanetary
magnetic field.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
20 Mar 2001 Southern region MUFs depressed 30%
21 Mar 2001 Southern region MUFs depressed 30%
24 Mar 2001 Southern region MUFs depressed 30%
31 Mar 2001 Southern region MUFs depressed 50%,
after 21UT.(local dawn on 01 Ap).
01 Apr 2001 Southern region MUFs depressed 50%.
Depressed conditions followed coronal mass ejection
induced disturbances. Very depressed MUFs observed
late 31 Mar-01 Apr. Absorption was observed at polar
regions 29-31 Mar, in association with a proton
event from the X1 flare.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
01 Mar 01 08 3 Mar 01 04 Mar 01
19 Mar 01 09 20 Mar 01 20 Mar 01
20 Mar 01 10 21 Mar 01 21 Mar 01
23 Mar 01 11 24 Mar 01 24 Mar 01
25 Mar 01 12 26 Mar 01 28 Mar 01
28 Mar 01 13 28 Mar 01 29 Mar 01
28 Mar 01 14 29 Mar 01 01 Apr 01
28 Mar 01 15 30 Mar 01 01 Apr 01
31 Mar 01 16 01 Apr 01 02 Apr 01
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
01 Mar 01 04 2 Mar 01 03 Mar 01
16 Mar 01 05 18 Mar 01 18 Mar 01
20 Mar 01 06 20 Mar 01 21 Mar 01
27 Mar 01 07 27 Mar 01 28 Mar 01
28 Mar 01 08 29 Mar 01 31 Mar 01
30 Mar 01 09 30 Mar 01 01 Apr 01
ALERTS:
05 Mar 01: GEOMAGNETIC
05 Mar 01: GEOMAGNETIC
10 Mar 01: FLARE ALERT
19 Mar 01: GEOMAGNETIC
20 Mar 01: GEOMAGNETIC
20 Mar 01: GEOMAGNETIC
20 Mar 01: GEOMAGNETIC
20 Mar 01: GEOMAGNETIC
20 Mar 01: FLARE ALERT
20 Mar 01: GEOMAGNETIC
21 Mar 01: GEOMAGNETIC
22 Mar 01: FLARE ALERT
23 Mar 01: GEOMAGNETIC
24 Mar 01: GEOMAGNETIC
24 Mar 01: FLARE ALERT
25 Mar 01: FLARE ALERT
26 Mar 01: FLARE ALERT
27 Mar 01: GEOMAGNETIC
28 Mar 01: GEOMAGNETIC
28 Mar 01: FLARE ALERT
29 Mar 01: FLARE ALERT
29 Mar 01: GEOMAGNETIC
29 Mar 01: PROTON BEGIN
30 Mar 01: FLARE ALERT
31 Mar 01: GEOMAGNETIC
31 Mar 01: FLARE ALERT
31 Mar 01: PROTON END
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
10 Mar 01: SWF ALERT (0359-0414 UT)
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au/users/asfc/
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
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